From which of the following atoms would it be the easiest to remove an electron

Question

From which of the following atoms would it be the easiest to remove an electron from? Sr Cd Fb Xe Dalton was absolutely correct in his statement that all atoms of the same element are identical. True False The number of protons is always equal to the number of electrons for any given atom. True False When milk goes "sour", only a physical change has occurred. True False When elements combine to form compounds, those compounds have the properties that are completely different from those of me elements to True False The elements arranged on the modern version of the periodic table in order of increasing mass number True False If a sealed baloon containing 10 grams of liquid water is heated sealed balloon will weigh lessthan the original. True False

Explanation / Answer

16. The answer is Sr. Because it is electroposive element and it contians only two electrons in their outermost orbit.

17.True

18.False. The number of protons is equal to number of electrons for neutral atoms. But atoms are changed to charged species by loosing or gaining the electrons, then protons are not equal to number of electrons.

19.False. Milk goes to sour is a chemical change.

20.True.    H2 + Cl2 ----------- 2 HCl.

21.False. The elements are arranged in modern periodic table in the increasing order of their atomic numbers.

22.False.

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